EP 3994121 B1 20240612 - METHOD FOR THE PURIFICATION OF ANILINE
Title (en)
METHOD FOR THE PURIFICATION OF ANILINE
Title (de)
VERFAHREN ZUR REINIGUNG VON ANILIN
Title (fr)
PROCÉDÉ DE NETTOYAGE D'ANILINE
Publication
Application
Priority
- EP 19184067 A 20190703
- EP 20180092 A 20200615
- EP 2020068525 W 20200701
Abstract (en)
[origin: WO2021001424A1] The invention relates to a method for the purification of aniline, comprising the following steps: a) providing a raw aniline fraction; b) extracting the raw aniline fraction with an aqueous extractant containing, in relation to the total mass of the aqueous extractant, an alkali metal hydroxide in a concentration range from 0.009 to 2.05 mass % and an alkali metal salt that is different from an alkali metal hydroxide in a concentration range from 2.40 to 25.0 mass %, wherein an organic aniline phase and an aqueous amino phenolate phase are obtained after a phase separation; c) distilling the organic aniline phase from step b), obtaining a flow of purified aniline, a gaseous flow that boils at a lower temperature than aniline and containing organic impurities, and a liquid flow that boils at a higher temperature than aniline and containing organic impurities and aniline.
IPC 8 full level
C07C 209/36 (2006.01); C07C 209/84 (2006.01); C07C 211/46 (2006.01)
CPC (source: CN EP KR US)
C07C 209/36 (2013.01 - CN EP KR); C07C 209/84 (2013.01 - CN EP KR US); C07C 211/46 (2013.01 - KR)
C-Set (source: CN EP)
CN
EP
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2021001424 A1 20210107; CN 114096512 A 20220225; EP 3994121 A1 20220511; EP 3994121 B1 20240612; JP 2022538663 A 20220905; KR 20220032014 A 20220315; US 2022348533 A1 20221103
DOCDB simple family (application)
EP 2020068525 W 20200701; CN 202080048429 A 20200701; EP 20734584 A 20200701; JP 2021578132 A 20200701; KR 20217043059 A 20200701; US 202017620900 A 20200701